Crop video following a path in Avisynth

[RYCB]

Hello I got this video of a girl moving and I want to crop the video leaving only the girl in it so I wonder if is there a way to make the crop parameters move following a path or something like that, thanks.

another option would be adding black bars that move blackening everything but the girl

[jagabo]

You can use the Animate() function along with Crop(). Only a linear path will be allowed. Unless you use several Animate() calls. For example:

 Animate(0,100, "crop", 380,0,640,480, 300,75,640,480)

moves a 640x480 box from 380,0 to 300,75 over frames 0 to 100. Be careful, YUY2 and YV12 video requires mod2 crops. You'll have to use RGB if the pan requires motion by odd numbers of pixels.

[RYCB]

You can use the Animate() function along with Crop(). Only a linear path will be allowed. Unless you use several Animate() calls. For example:

 Animate(0,100, "crop", 380,0,640,480, 300,75,640,480)

moves a 640x480 box from 380,0 to 300,75 over frames 0 to 100. Be careful, YUY2 and YV12 video requires mod2 crops. You'll have to use RGB if the pan requires motion by odd numbers of pixels.

Thank you very much! this is exactly what I was looking for.